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14 Cards in this Set

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  • Back

Large collections of planets, gas, dust, and millions or billions of stars, bound together by gravity.

Galaxies

Units of distance in astronemy equal to the distance that light travels in one year.



Light-Years

A measure of the amount of radiating or refleted light coming off a star or other celestial object; brightness

Luminosity

A region or cloud of interstellar dust and gas appearing as a bright or dark patch.

Nubula

To revolve around another object.

Orbit

A star and the celestial bodies that revolve around it; a planitary system.

Solar System

Bodies in outer space, made of hot gases, that shine in the night sky.

Stars

The death explosion of a massive star, resulting in a sharp increase in brightness followed by a gradual fading.

Supernova

Instruments used to make distant objects look closer.

Telescopes

Scientists who study planets.

Astonimers

A theory that suggests that the universe began from a single, enourmus explosion.

Big Bang Theory

A region of space within a gravitational field so intense that nothing can escape it.

Black Hole

A close group.

Cluster



Scientists who study the organ and structure of the universe.

Cosmologists